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美国肯塔基州的阿帕拉契亚煤田主要开采通常认为不可采的薄煤层并取得了突出成绩。在开采0.62米以下的薄煤层时,每天一班生产,每周生产5天,达到月产7000吨的水平。良好的开采条件及由采煤工作面至地面的连续运输是取得上述成绩的两个主要原因。该煤田位于丘陵地带,大部分煤矿是从山边煤层露头沿煤层直接向山内开采的,大多采用房柱式开采法。该煤田的煤层平缓,不超过5°,煤层厚度一般不超过1米。
The Appalachian coal field in Kentucky, USA, mainly produces thin coal seams that are generally considered non-recoverable and has achieved outstanding results. In the exploitation of thin coal seams below 0.62 meters, the production of a day, weekly production of 5 days, reaching 7,000 tons per month level. Good mining conditions and continuous transport from mining face to ground are the two main reasons for achieving the above result. The coalfield is located in the hilly area, most of the coal mines from the coal seam outcropping along the coal seam directly to the mountains, mostly by the column and column mining method. The coal seam of the coalfield is gentle, not exceeding 5 °, and the thickness of the coal seam generally does not exceed 1 meter.